print prec_delta (#48957)

* print prec_delta

* modify after zhangbo reviewed

* print prec delta

tools/get_pr_ut.py

@@ -384,6 +384,10 @@ class PRChecker:
                 "ipipe_log_param_PRECISION_TEST_Cases_ratio: %s"
                 % PRECISION_TEST_Cases_ratio
             )
+            print(
+                "The unittests in prec delta is shown as following: %s"
+                % ut_list
+            )
             return '\n'.join(ut_list)
         else:
             for f in file_list: